Brunetti Mercury
Posted by Frank_NH on Oct 18, 2015; 3:33am
URL: http://guitar-fx-layouts.238.s1.nabble.com/Brunetti-Mercury-tp25277.html
Hey all. Here's another layout for an effect that I recently built - the Brunetti Mercury distortion. There is a vero of this already at Harald Sabro's site. Mine differs in some key ways:
* I use trimmers for the jfets so you can bias the drains
* There is a slight mod for the output capacitor (3.3nF --> 330 pF) which removes less high end
* Some differences in the potentiometer values based on my tastes (Gain is 50K rather than 250K, and the Volume is 100K versus 50K)
* I also used all 2N5457s in my build rather than j201s as it tames the distortion somewhat (along with a lower drive pot) making it less "wooly". It's got plenty of muscle though!
The effect uses a charge pump for higher voltage and more headroom, and is relatively low noise as far as dirt boxes go. And the Bite and Body controls are very effective in controlling treble and bass.
In anyone builds this, let me know if there are problems with this layout. My original layout was slightly larger and I managed to shrink it by one column. Have fun!
Additional notes: 2/19/2016
* Updated the vero layout with minor edits. Verified by building it again!
URL: http://guitar-fx-layouts.238.s1.nabble.com/Brunetti-Mercury-tp25277.html
Hey all. Here's another layout for an effect that I recently built - the Brunetti Mercury distortion. There is a vero of this already at Harald Sabro's site. Mine differs in some key ways:
* I use trimmers for the jfets so you can bias the drains
* There is a slight mod for the output capacitor (3.3nF --> 330 pF) which removes less high end
* Some differences in the potentiometer values based on my tastes (Gain is 50K rather than 250K, and the Volume is 100K versus 50K)
* I also used all 2N5457s in my build rather than j201s as it tames the distortion somewhat (along with a lower drive pot) making it less "wooly". It's got plenty of muscle though!
The effect uses a charge pump for higher voltage and more headroom, and is relatively low noise as far as dirt boxes go. And the Bite and Body controls are very effective in controlling treble and bass.
In anyone builds this, let me know if there are problems with this layout. My original layout was slightly larger and I managed to shrink it by one column. Have fun!
Additional notes: 2/19/2016
* Updated the vero layout with minor edits. Verified by building it again!
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